New multifunctional muzzle attachments for firearms providing substantial improvement in shooting accuracy in comparison with prior known muzzle attachments are disclosed that simultaneously provide a combination of four different functions, namely, compensate for gun rise, serve to reduce recoil, reduce flash around the muzzle when the firearm is fired and an interface for a suppressor. The substance has a polystyrene reduced number-average molecular weight of 5104 to 1108, and contains repeating units represented by formula and formula : Ar3k. A heat exchanger is fluidly coupled to the reservoir and is in simultaneous communication with the fluid and an air stream. The SQL responses are sent back to the user as data responses.